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NJU8753 - Analog Signal Input Class D Amplifier

General Description

The NJU8753 is an analog signal input class D power amplifier with DC-DC converter for Piezo speaker.

Input part operates on 2.85V(typ) and a built-in DC-DC converter generates variable output voltage(up to 12V) with input voltage(2.6 to 4.2V).

Key Features

  • Piezo Speaker Driving Output voltage: 8Vrms(Typ. ) @VDDO=10.0V 1-channel Analog Signal Input, 1-channel BTL output Standby(Hi-Z), Built-in DC-DC Converter Built-in Low Voltage Detector Built-in Short Protector Operating Voltage :2.6~3.6V(VDD, VREG) :2.6~4.2V(VBAT) CMOS Technology Package Outline :QFN28 PIN.

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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NJU8753 www.DataSheet4U.com PRELIMINARY Analog Signal Input Class D Amplifier with DC-DC Converter for Piezo Speaker GENERAL DESCRIPTION The NJU8753 is an analog signal input class D power amplifier with DC-DC converter for Piezo speaker. Input part operates on 2.85V(typ) and a built-in DC-DC converter generates variable output voltage(up to 12V) with input voltage(2.6 to 4.2V). Therefore, it drives Piezo speaker with louder sound and high efficiency. The NJU8753 incorporates BTL amplifier, which eliminate AC coupling capacitors, capable of driving monaural Piezo speaker with simple external LC low-pass filters. Class D operation achieves lower power operation for Piezo speaker, thus the NJU8753 is suited for batterypowered applications.